Home / 13,580.87-20,372.21-3,719.32

Finding the Fourth Proportional to 13,580.87, 20,372.21 and 3,719.32

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Solution

The fourth proportional to 13,580.87, 20,372.21 and 3,719.32 is: 5,579.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.87 : 20,372.21 = 3,719.32 : x
  2. Step 2: Convert to fraction form
    13,580.87/20,372.21 = 3,719.32/x
  3. Step 3: Cross multiply
    13,580.87x = 20,372.21 × 3,719.32
  4. Step 4: Simplify right side
    13,580.87x = 75,770,712.52
  5. Step 5: Solve for x
    x = 75,770,712.52/13,580.87
  6. Step 6: Final answer
    x = 5,579.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.